"How reliable is the 2020 Audi S4?"

"Based on 34 NHTSA complaints, the 2020 Audi S4 has a median complaint mileage of 0 miles. The most common issue is ELECTRICAL SYSTEM."

"What are common problems with the 2020 Audi S4?"

"The most frequently reported component in NHTSA complaints for the 2020 Audi S4 is ELECTRICAL SYSTEM, accounting for a significant portion of the 34 total complaints filed."

2020 Audi S4: Reliability Data

Source: NHTSA — 34 complaints

Total Complaints

ELECTRICAL SYSTEM

Top Issue

Crash Reports

What Fails?

Most reported component issues from NHTSA complaints.

ELECTRICAL SYSTEM

BACK OVER PREVENTION: WARNINGS

UNKNOWN OR OTHER

BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING

VISIBILITY/WIPER

FORWARD COLLISION AVOIDANCE: WARNINGS

LANE DEPARTURE: BLIND SPOT DETECTION

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"SOS module. Audi had a service for the known problem internally (Service Action 90T2) then stopped it apparently but many of us still experiencing issues that were not able to get the part corrected. SOS, GPS, Bluetooth, all hands free does not work. 6 months plus of waiting for a $2k part on backor..."

"The MMI system is frequently rebooting at random moments while driving."

"The primary infotainment/mmi screen randomly turns off and a system reboot occurs, which can take a period of time. This causes a loss of all parking sensors, rear view cameras, navigation etc. Dangerous when the system dies in the middle of a bustle parking lot or having to restart the system at hi..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28